UCC2809D-1 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments UCC2809D-1 is a primary-side PWM switching controller operating from 10 V to 19 V supply, supporting both current-mode and voltage-mode control in an 8-pin SOIC package. It uses pulse-width modulation to regulate isolated and non-isolated SMPS converters for telecom, industrial, and computing power supply designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UCC2809D-1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.5000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UCC2809D-1?
- Dual current-mode and voltage-mode PWM control architecture providing flexibility for flyback, forward, and boost converter topologies
- Input supply range of 10 V to 19 V with 12 V nominal operation, directly powered from standard intermediate bus rails without auxiliary supplies
- Compact 8-pin SOIC package reducing controller footprint and simplifying layout in space-constrained power supply designs
What is UCC2809D-1 used for?
The UCC2809D-1 is used as the primary-side controller in isolated flyback and forward SMPS converters for 24 V to 48 V industrial power supplies, where its 10 V to 19 V input range suits standard bias winding voltages. It is also applied in off-line adapter designs and telecom rectifier modules where current-mode PWM control provides cycle-by-cycle current limiting and fast transient response to load steps.
What are the specifications of UCC2809D-1?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT/VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 19V |
| Input Voltage-Min | 10V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 25mA |
| Supply Voltage-Max (Vsup) | 19V |
| Supply Voltage-Min (Vsup) | 10V |
| Supply Voltage-Nom (Vsup) | 12V |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 1000kHz |
| Technology | BCDMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mexico |
Where can I find the UCC2809D-1 datasheet?
UCC2809D-1 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UCC2809D-1?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What supply voltage range does the UCC2809D-1 require, and what converter topologies does it support?
The UCC2809D-1 operates from a 10 V minimum to 19 V maximum supply, with a 12 V nominal rating that matches common bias winding voltages. It supports flyback, forward, and boost PWM converter topologies using either current-mode or voltage-mode control, making it a versatile primary-side controller across a wide range of isolated SMPS designs.
What PWM control modes does the UCC2809D-1 offer, and how does current-mode control benefit power supply stability?
The UCC2809D-1 supports both current-mode and voltage-mode PWM control. In current-mode operation, the controller senses peak switch current on a cycle-by-cycle basis and uses it as a second feedback variable, inherently limiting switch current during overload and improving transient response by making the inductor behave as a current source rather than a voltage-controlled element.
In what package does the UCC2809D-1 come, and how does this influence PCB layout for an SMPS design?
The UCC2809D-1 comes in an 8-pin SOIC package with 1.27 mm pin pitch, occupying approximately 5 mm x 4 mm of PCB area. This compact footprint allows placement close to gate-drive and feedback network components, minimizing high-frequency loop area and reducing parasitic inductance that could degrade switching noise performance.
How does the UCC2809D-1 protect the converter during switch overcurrent events?
In current-mode operation, the UCC2809D-1 compares the sensed switch current to an error amplifier output reference on every switching cycle. When the current exceeds the threshold, the PWM pulse terminates immediately, limiting peak switch current to a safe level within 1 switching cycle and preventing transformer or MOSFET damage during sudden load transients or short circuits.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.3100 | $2.31 |
| 100+ | $1.7300 | $173.00 |
| 1000+ | $1.5000 | $1500.00 |
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